Q1.it will stuck when opening two or three files (about over 500MB each) in split screen mode.
Q2.it will stuck when opening two or three files (about over 300MB each) in multi-tab pages.
Q3.it will stuck when using a file over several hours(over 5 hours indoor and over 2 hours outdoor(may be because the weather is hot) about over 500MB),and the picture page of PDF will turn white and only show all image(lines,txt,draws…) made by GoodNOtes5

can you do some optimization on these problems?
such as pause the status “respond at any time” of the file which dosen’t be focused on(multi-flies sense) so that the problem in Q1&Q2 can be solved.